Five 1,3diisopropoxyaloxanes,i.e.,(PriO)RO2AlOAlO2R(OPri)_C18H35(),_C9H16CH=CHC7H15(),_P(OCH2(C2H5)CHC4H9)2(),and_C12H23(),respectively]were synthesized by the hydrolysiscondensation of aluminium isopropoxide with wat...Five 1,3diisopropoxyaloxanes,i.e.,(PriO)RO2AlOAlO2R(OPri)_C18H35(),_C9H16CH=CHC7H15(),_P(OCH2(C2H5)CHC4H9)2(),and_C12H23(),respectively]were synthesized by the hydrolysiscondensation of aluminium isopropoxide with water and exchange reaction with relevant acids.They were characterized by elemental analysis,determination of molecular weight,IR,and 27Al NMR.The results show that the coordination number of Al atom in the compounds is 5 and they exist in monomers in benzene.The analyses of TG/DTG and DTA indicated that both the thermal hydrolysis stability and thermal stability of these compounds are in the following order:<<<.The viscosity determinations of light calcium carbonate(LCaCO3)/liquid paraffin suspension systems demonstrated that they had an excellent modification effect on the surface of LCaCO3 filler and the amount needed to form a monomolecular film on the surface of LCaCO3 particles is in the order.展开更多
文摘Five 1,3diisopropoxyaloxanes,i.e.,(PriO)RO2AlOAlO2R(OPri)_C18H35(),_C9H16CH=CHC7H15(),_P(OCH2(C2H5)CHC4H9)2(),and_C12H23(),respectively]were synthesized by the hydrolysiscondensation of aluminium isopropoxide with water and exchange reaction with relevant acids.They were characterized by elemental analysis,determination of molecular weight,IR,and 27Al NMR.The results show that the coordination number of Al atom in the compounds is 5 and they exist in monomers in benzene.The analyses of TG/DTG and DTA indicated that both the thermal hydrolysis stability and thermal stability of these compounds are in the following order:<<<.The viscosity determinations of light calcium carbonate(LCaCO3)/liquid paraffin suspension systems demonstrated that they had an excellent modification effect on the surface of LCaCO3 filler and the amount needed to form a monomolecular film on the surface of LCaCO3 particles is in the order.
